======================================
| # TEST: IPv4 over geneve4: PMTU exceptions                            [ OK ]
| [  225.712120][   T72] ------------[ cut here ]------------
| [ 225.712566][ T72] WARNING: CPU: 1 PID: 72 at drivers/net/geneve.c:1914 geneve_exit_batch_rtnl (drivers/net/geneve.c:1914 (discriminator 1)) geneve
| [  225.713243][   T72] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  225.714340][   T72] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  225.715015][   T72] Workqueue: netns cleanup_net
[ 225.715289][ T72] RIP: 0010:geneve_exit_batch_rtnl (drivers/net/geneve.c:1914 (discriminator 1)) geneve
[ 225.715667][ T72] Code: 00 48 8b 83 b8 00 00 00 48 8d 98 48 ff ff ff 48 39 44 24 10 75 a5 48 83 c4 20 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc 90 <0f> 0b 90 eb b9 e8 d2 3d 4a dc e9 2d fe ff ff 48 89 cf 48 89 4c 24
All code
========
   0:	00 48 8b             	add    %cl,-0x75(%rax)
   3:	83 b8 00 00 00 48 8d 	cmpl   $0xffffff8d,0x48000000(%rax)
   a:	98                   	cwtl
   b:	48 ff                	rex.W (bad)
   d:	ff                   	(bad)
   e:	ff 48 39             	decl   0x39(%rax)
  11:	44 24 10             	rex.R and $0x10,%al
  14:	75 a5                	jne    0xffffffffffffffbb
  16:	48 83 c4 20          	add    $0x20,%rsp
  1a:	5b                   	pop    %rbx
  1b:	5d                   	pop    %rbp
  1c:	41 5c                	pop    %r12
  1e:	41 5d                	pop    %r13
  20:	41 5e                	pop    %r14
  22:	41 5f                	pop    %r15
  24:	c3                   	ret
  25:	cc                   	int3
  26:	cc                   	int3
  27:	cc                   	int3
  28:	cc                   	int3
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	eb b9                	jmp    0xffffffffffffffe8
  2f:	e8 d2 3d 4a dc       	call   0xffffffffdc4a3e06
  34:	e9 2d fe ff ff       	jmp    0xfffffffffffffe66
  39:	48 89 cf             	mov    %rcx,%rdi
  3c:	48                   	rex.W
  3d:	89                   	.byte 0x89
  3e:	4c                   	rex.WR
  3f:	24                   	.byte 0x24

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	eb b9                	jmp    0xffffffffffffffbe
   5:	e8 d2 3d 4a dc       	call   0xffffffffdc4a3ddc
   a:	e9 2d fe ff ff       	jmp    0xfffffffffffffe3c
   f:	48 89 cf             	mov    %rcx,%rdi
  12:	48                   	rex.W
  13:	89                   	.byte 0x89
  14:	4c                   	rex.WR
  15:	24                   	.byte 0x24
[  225.716711][   T72] RSP: 0018:ffffc9000052fbe0 EFLAGS: 00010297
[  225.717053][   T72] RAX: ffff888008734008 RBX: ffff888006ad0040 RCX: 1ffff11000b45536
[  225.717479][   T72] RDX: 1ffff11000a52406 RSI: 1ffff11005d054be RDI: ffff888005a2a9b0
[  225.717967][   T72] RBP: ffff888005292030 R08: ffff888005a2a9b8 R09: fffffbfff43ea078
[  225.718443][   T72] R10: ffffffffa1f503c7 R11: ffff88802e9fc508 R12: dffffc0000000000
[  225.718914][   T72] R13: fffffbfff3fcf027 R14: ffffffffa0565698 R15: ffff888005291fd0
[  225.719393][   T72] FS:  0000000000000000(0000) GS:ffff88802e800000(0000) knlGS:0000000000000000
[  225.719959][   T72] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  225.720359][   T72] CR2: 000055ba460c3190 CR3: 0000000033134001 CR4: 00000000001706f0
[  225.720822][   T72] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  225.721335][   T72] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  225.721798][   T72] Call Trace:
[  225.721982][   T72]  <TASK>
[ 225.722176][ T72] ? __warn (kernel/panic.c:677) 
[ 225.722416][ T72] ? geneve_exit_batch_rtnl (drivers/net/geneve.c:1914 (discriminator 1)) geneve
[ 225.722795][ T72] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 225.723099][ T72] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 225.723367][ T72] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 225.723636][ T72] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 225.723953][ T72] ? geneve_exit_batch_rtnl (drivers/net/geneve.c:1914 (discriminator 1)) geneve
[ 225.724352][ T72] ? default_device_exit_batch_rtnl (net/core/dev.c:11626) 
[ 225.724729][ T72] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 225.724974][ T72] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 225.725309][ T72] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 225.725596][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 225.725853][ T72] ? process_one_work (kernel/workqueue.c:2609) 
[ 225.726151][ T72] process_one_work (kernel/workqueue.c:2638) 
[ 225.726431][ T72] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 225.726693][ T72] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 225.727012][ T72] ? assign_work (kernel/workqueue.c:1101) 
[ 225.727280][ T72] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 225.727537][ T72] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 225.727907][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 225.728202][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 225.728483][ T72] kthread (kernel/kthread.c:388) 
[ 225.728708][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 225.728967][ T72] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 225.729226][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 225.729481][ T72] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  331.626459][   T72] ==================================================================
| [ 331.626970][ T72] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:729) 
| [  331.627383][   T72] Read of size 1 at addr ffff8880089cc2fc by task kworker/u8:1/72
| [  331.627813][   T72]
[  331.628477][   T72] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  331.629143][   T72] Workqueue: netns cleanup_net
[  331.629431][   T72] Call Trace:
[  331.629620][   T72]  <TASK>
[ 331.629788][ T72] dump_stack_lvl (lib/dump_stack.c:107) 
[ 331.630047][ T72] print_address_description.constprop.0 (mm/kasan/report.c:378) 
[ 331.630423][ T72] ? kobject_put (lib/kobject.c:729) 
[ 331.630673][ T72] print_report (mm/kasan/report.c:489) 
[ 331.630918][ T72] ? kasan_addr_to_slab (./arch/x86/include/asm/bitops.h:206 ./arch/x86/include/asm/bitops.h:238 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 ./include/linux/page-flags.h:481 mm/kasan/../slab.h:206 mm/kasan/common.c:38) 
[ 331.631201][ T72] kasan_report (mm/kasan/report.c:603) 
[ 331.631446][ T72] ? kobject_put (lib/kobject.c:729) 
[ 331.631806][ T72] kobject_put (lib/kobject.c:729) 
[ 331.632113][ T72] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) 
[ 331.632510][ T72] br_dev_delete (net/bridge/br_if.c:396) 
[ 331.632919][ T72] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 331.633381][ T72] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 331.633772][ T72] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 331.634263][ T72] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 331.634693][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 331.635098][ T72] ? process_one_work (kernel/workqueue.c:2609) 
[ 331.635542][ T72] process_one_work (kernel/workqueue.c:2638) 
[ 331.635975][ T72] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 331.636370][ T72] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 331.636837][ T72] ? assign_work (kernel/workqueue.c:1101) 
[ 331.637239][ T72] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 331.637647][ T72] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 331.638217][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 331.638659][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 331.639103][ T72] kthread (kernel/kthread.c:388) 
[ 331.639465][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 331.639863][ T72] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 331.640253][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 331.640652][ T72] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  331.671233][   T72] ------------[ cut here ]------------
| [  331.671756][   T72] refcount_t: underflow; use-after-free.
| [ 331.672360][ T72] WARNING: CPU: 0 PID: 72 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
| [  331.673176][   T72] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  331.675115][   T72] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  331.676222][   T72] Workqueue: netns cleanup_net
[ 331.676684][ T72] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[ 331.677288][ T72] Code: f9 82 03 80 fb 01 0f 87 ee 02 b1 01 83 e3 01 0f 85 4d ff ff ff c6 05 9a f9 82 03 01 90 48 c7 c7 20 7a 02 9f e8 3e 05 2a ff 90 <0f> 0b 90 90 e9 2f ff ff ff 48 89 df e8 8c 68 a6 ff e9 b6 fe ff ff
All code
========
   0:	f9                   	stc
   1:	82                   	(bad)
   2:	03 80 fb 01 0f 87    	add    -0x78f0fe05(%rax),%eax
   8:	ee                   	out    %al,(%dx)
   9:	02 b1 01 83 e3 01    	add    0x1e38301(%rcx),%dh
   f:	0f 85 4d ff ff ff    	jne    0xffffffffffffff62
  15:	c6 05 9a f9 82 03 01 	movb   $0x1,0x382f99a(%rip)        # 0x382f9b6
  1c:	90                   	nop
  1d:	48 c7 c7 20 7a 02 9f 	mov    $0xffffffff9f027a20,%rdi
  24:	e8 3e 05 2a ff       	call   0xffffffffff2a0567
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	e9 2f ff ff ff       	jmp    0xffffffffffffff62
  33:	48 89 df             	mov    %rbx,%rdi
  36:	e8 8c 68 a6 ff       	call   0xffffffffffa668c7
  3b:	e9 b6 fe ff ff       	jmp    0xfffffffffffffef6

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	e9 2f ff ff ff       	jmp    0xffffffffffffff38
   9:	48 89 df             	mov    %rbx,%rdi
   c:	e8 8c 68 a6 ff       	call   0xffffffffffa6689d
  11:	e9 b6 fe ff ff       	jmp    0xfffffffffffffecc
[  331.678843][   T72] RSP: 0018:ffffc9000052fb98 EFLAGS: 00010282
[  331.679250][   T72] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff9c31056f
[  331.679734][   T72] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  331.680229][   T72] RBP: 0000000000000003 R08: 0000000000000000 R09: fffff520000a5f18
[  331.680714][   T72] R10: ffffc9000052f8c7 R11: 205d323754202020 R12: ffff888009bb2000
[  331.681212][   T72] R13: ffff888009bb2df8 R14: ffffc9000052fc98 R15: ffff888009bb2bc0
[  331.681676][   T72] FS:  0000000000000000(0000) GS:ffff88802e400000(0000) knlGS:0000000000000000
[  331.682227][   T72] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  331.682634][   T72] CR2: 000056054838d568 CR3: 0000000033134006 CR4: 00000000001706f0
[  331.683130][   T72] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  331.683593][   T72] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  331.684091][   T72] Call Trace:
[  331.684300][   T72]  <TASK>
[ 331.684490][ T72] ? __warn (kernel/panic.c:677) 
[ 331.684763][ T72] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[ 331.685133][ T72] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 331.685434][ T72] ? vprintk_emit (kernel/printk/printk.c:2313) 
[ 331.685736][ T72] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 331.686027][ T72] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 331.686318][ T72] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 331.686645][ T72] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 331.686935][ T72] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[ 331.687290][ T72] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) 
[ 331.687628][ T72] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) 
[ 331.687918][ T72] br_dev_delete (net/bridge/br_if.c:396) 
[ 331.688237][ T72] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 331.688570][ T72] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 331.688824][ T72] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 331.689169][ T72] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 331.689514][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 331.689779][ T72] ? process_one_work (kernel/workqueue.c:2609) 
[ 331.690073][ T72] process_one_work (kernel/workqueue.c:2638) 
[ 331.690350][ T72] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 331.690607][ T72] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 331.690908][ T72] ? assign_work (kernel/workqueue.c:1101) 
[ 331.691213][ T72] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 331.691522][ T72] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 331.691933][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 331.692264][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 331.692577][ T72] kthread (kernel/kthread.c:388) 
[ 331.692844][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 331.693152][ T72] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 331.693438][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 331.693725][ T72] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  331.697122][   T72] ------------[ cut here ]------------
| [  331.697444][   T72] sysfs group 'bridge' not found for kobject 'br0'
| [ 331.697873][ T72] WARNING: CPU: 0 PID: 72 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  331.698543][   T72] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  331.699839][   T72] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  331.700568][   T72] Workqueue: netns cleanup_net
[ 331.700882][ T72] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 331.701256][ T72] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 9e e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 9e 	mov    $0xffffffff9efca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  331.702360][   T72] RSP: 0018:ffffc9000052fba0 EFLAGS: 00010282
[  331.702742][   T72] RAX: 0000000000000000 RBX: ffffffff9f3be220 RCX: ffffffff9c31056f
[  331.703240][   T72] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  331.703717][   T72] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a5f19
[  331.704197][   T72] R10: ffffc9000052f8cf R11: 205d323754202020 R12: ffff888009bb2628
[  331.704678][   T72] R13: ffff888009bb2df8 R14: ffffc9000052fc98 R15: ffff888009bb2bc0
[  331.705176][   T72] FS:  0000000000000000(0000) GS:ffff88802e400000(0000) knlGS:0000000000000000
[  331.705705][   T72] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  331.706113][   T72] CR2: 000056054838d568 CR3: 0000000033134006 CR4: 00000000001706f0
[  331.706586][   T72] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  331.707087][   T72] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  331.707566][   T72] Call Trace:
[  331.707778][   T72]  <TASK>
[ 331.707956][ T72] ? __warn (kernel/panic.c:677) 
[ 331.708227][ T72] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 331.708536][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 331.708864][ T72] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 331.709166][ T72] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 331.709466][ T72] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 331.709783][ T72] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 331.710123][ T72] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 331.710372][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 331.710665][ T72] br_dev_delete (net/bridge/br_if.c:396) 
[ 331.710928][ T72] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 331.711238][ T72] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 331.711486][ T72] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) 
[ 331.711798][ T72] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 331.712088][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 331.712378][ T72] ? process_one_work (kernel/workqueue.c:2609) 
[ 331.712708][ T72] process_one_work (kernel/workqueue.c:2638) 
[ 331.713053][ T72] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 331.713350][ T72] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 331.713688][ T72] ? assign_work (kernel/workqueue.c:1101) 
[ 331.713993][ T72] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 331.714305][ T72] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 331.714721][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 331.715053][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 331.715334][ T72] kthread (kernel/kthread.c:388) 
[ 331.715561][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 331.715813][ T72] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 331.716068][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 331.716321][ T72] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  346.249330][   T72] ------------[ cut here ]------------
| [  346.249677][   T72] sysfs group 'bridge' not found for kobject 'br0'
| [ 346.250105][ T72] WARNING: CPU: 2 PID: 72 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  346.250644][   T72] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  346.251854][   T72] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  346.252532][   T72] Workqueue: netns cleanup_net
[ 346.252797][ T72] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 346.253125][ T72] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 9e e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 9e 	mov    $0xffffffff9efca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  346.254203][   T72] RSP: 0018:ffffc9000052fba0 EFLAGS: 00010282
[  346.254555][   T72] RAX: 0000000000000000 RBX: ffffffff9f3be220 RCX: ffffffff9c31056f
[  346.255027][   T72] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  346.255485][   T72] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a5f19
[  346.255934][   T72] R10: ffffc9000052f8cf R11: 205d323754202020 R12: ffff88800854a628
[  346.256431][   T72] R13: ffff88800854adf8 R14: ffffc9000052fc98 R15: ffff88800854abc0
[  346.256879][   T72] FS:  0000000000000000(0000) GS:ffff88802ec00000(0000) knlGS:0000000000000000
[  346.257416][   T72] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  346.257793][   T72] CR2: 00007fe277c45000 CR3: 0000000033134001 CR4: 00000000001706f0
[  346.258282][   T72] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  346.258739][   T72] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  346.259236][   T72] Call Trace:
[  346.259414][   T72]  <TASK>
[ 346.259607][ T72] ? __warn (kernel/panic.c:677) 
[ 346.259865][ T72] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 346.260170][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 346.260464][ T72] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 346.260758][ T72] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 346.261033][ T72] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 346.261298][ T72] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 346.261572][ T72] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 346.261817][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 346.262108][ T72] br_dev_delete (net/bridge/br_if.c:396) 
[ 346.262359][ T72] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 346.262644][ T72] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 346.262883][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 346.263172][ T72] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 346.263468][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 346.263761][ T72] ? process_one_work (kernel/workqueue.c:2609) 
[ 346.264085][ T72] process_one_work (kernel/workqueue.c:2638) 
[ 346.264419][ T72] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 346.264681][ T72] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 346.265059][ T72] ? assign_work (kernel/workqueue.c:1101) 
[ 346.265331][ T72] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 346.265609][ T72] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 346.266032][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 346.266348][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 346.266644][ T72] kthread (kernel/kthread.c:388) 
[ 346.266891][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 346.267180][ T72] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 346.267477][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 346.267736][ T72] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  359.775303][   T72] ------------[ cut here ]------------
| [  359.775659][   T72] sysfs group 'bridge' not found for kobject 'br0'
| [ 359.776097][ T72] WARNING: CPU: 1 PID: 72 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  359.776640][   T72] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  359.778033][   T72] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  359.778692][   T72] Workqueue: netns cleanup_net
[ 359.778975][ T72] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 359.779367][ T72] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 9e e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 9e 	mov    $0xffffffff9efca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  359.780483][   T72] RSP: 0018:ffffc9000052fba0 EFLAGS: 00010282
[  359.780809][   T72] RAX: 0000000000000000 RBX: ffffffff9f3be220 RCX: ffffffff9c31056f
[  359.781239][   T72] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  359.781664][   T72] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a5f19
[  359.782097][   T72] R10: ffffc9000052f8cf R11: 205d323754202020 R12: ffff88800a2a2628
[  359.782523][   T72] R13: ffff88800a2a2df8 R14: ffffc9000052fc98 R15: ffff88800a2a2bc0
[  359.782946][   T72] FS:  0000000000000000(0000) GS:ffff88802e800000(0000) knlGS:0000000000000000
[  359.783420][   T72] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  359.783827][   T72] CR2: 00007f95f5e50000 CR3: 0000000033134002 CR4: 00000000001706f0
[  359.784342][   T72] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  359.784773][   T72] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  359.785269][   T72] Call Trace:
[  359.785447][   T72]  <TASK>
[ 359.785644][ T72] ? __warn (kernel/panic.c:677) 
[ 359.785877][ T72] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 359.786180][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 359.786500][ T72] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 359.786758][ T72] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 359.787011][ T72] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 359.787275][ T72] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 359.787576][ T72] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 359.787863][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 359.788172][ T72] br_dev_delete (net/bridge/br_if.c:396) 
[ 359.788429][ T72] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 359.788746][ T72] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 359.789033][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 359.789329][ T72] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 359.789616][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 359.789895][ T72] ? process_one_work (kernel/workqueue.c:2609) 
[ 359.790240][ T72] process_one_work (kernel/workqueue.c:2638) 
[ 359.790520][ T72] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 359.790788][ T72] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 359.791143][ T72] ? assign_work (kernel/workqueue.c:1101) 
[ 359.791414][ T72] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 359.791717][ T72] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 359.792136][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 359.792450][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 359.792772][ T72] kthread (kernel/kthread.c:388) 
[ 359.793025][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 359.793315][ T72] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 359.793615][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 359.793891][ T72] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  374.049118][   T72] ------------[ cut here ]------------
| [  374.049523][   T72] sysfs group 'bridge' not found for kobject 'br0'
| [ 374.049942][ T72] WARNING: CPU: 1 PID: 72 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  374.050540][   T72] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  374.051886][   T72] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  374.052624][   T72] Workqueue: netns cleanup_net
[ 374.052888][ T72] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 374.053252][ T72] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 9e e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 9e 	mov    $0xffffffff9efca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  374.054490][   T72] RSP: 0018:ffffc9000052fba0 EFLAGS: 00010282
[  374.054906][   T72] RAX: 0000000000000000 RBX: ffffffff9f3be220 RCX: ffffffff9c31056f
[  374.055367][   T72] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  374.055786][   T72] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a5f19
[  374.056215][   T72] R10: ffffc9000052f8cf R11: 205d323754202020 R12: ffff88800a8ca628
[  374.056635][   T72] R13: ffff88800a8cadf8 R14: ffffc9000052fc98 R15: ffff88800a8cabc0
[  374.057060][   T72] FS:  0000000000000000(0000) GS:ffff88802e800000(0000) knlGS:0000000000000000
[  374.057533][   T72] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  374.057912][   T72] CR2: 00007f75819070e0 CR3: 0000000006732004 CR4: 00000000001706f0
[  374.058436][   T72] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  374.058906][   T72] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  374.059411][   T72] Call Trace:
[  374.059607][   T72]  <TASK>
[ 374.059797][ T72] ? __warn (kernel/panic.c:677) 
[ 374.060064][ T72] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 374.060371][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 374.060686][ T72] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 374.060991][ T72] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 374.061243][ T72] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 374.061521][ T72] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 374.061858][ T72] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 374.062124][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 374.062462][ T72] br_dev_delete (net/bridge/br_if.c:396) 
[ 374.062765][ T72] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 374.063079][ T72] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 374.063336][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 374.063621][ T72] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 374.063948][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 374.064207][ T72] ? process_one_work (kernel/workqueue.c:2609) 
[ 374.064486][ T72] process_one_work (kernel/workqueue.c:2638) 
[ 374.064751][ T72] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 374.065007][ T72] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 374.065299][ T72] ? assign_work (kernel/workqueue.c:1101) 
[ 374.065562][ T72] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 374.065812][ T72] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 374.066173][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 374.066495][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 374.066815][ T72] kthread (kernel/kthread.c:388) 
[ 374.067043][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 374.067288][ T72] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 374.067529][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 374.067777][ T72] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  387.810745][   T72] ------------[ cut here ]------------
| [  387.811113][   T72] sysfs group 'bridge' not found for kobject 'br0'
| [ 387.811531][ T72] WARNING: CPU: 1 PID: 72 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  387.812060][   T72] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  387.813419][   T72] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  387.814210][   T72] Workqueue: netns cleanup_net
[ 387.814537][ T72] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 387.814922][ T72] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 9e e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 9e 	mov    $0xffffffff9efca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  387.816170][   T72] RSP: 0018:ffffc9000052fba0 EFLAGS: 00010282
[  387.816568][   T72] RAX: 0000000000000000 RBX: ffffffff9f3be220 RCX: ffffffff9c31056f
[  387.817115][   T72] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  387.817626][   T72] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a5f19
[  387.818117][   T72] R10: ffffc9000052f8cf R11: 205d323754202020 R12: ffff8880085da628
[  387.818605][   T72] R13: ffff8880085dadf8 R14: ffffc9000052fc98 R15: ffff8880085dabc0
[  387.819146][   T72] FS:  0000000000000000(0000) GS:ffff88802e800000(0000) knlGS:0000000000000000
[  387.819706][   T72] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  387.820157][   T72] CR2: 00007fd1b8f3d000 CR3: 0000000033134002 CR4: 00000000001706f0
[  387.820654][   T72] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  387.821100][   T72] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  387.821544][   T72] Call Trace:
[  387.821730][   T72]  <TASK>
[ 387.821906][ T72] ? __warn (kernel/panic.c:677) 
[ 387.822143][ T72] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 387.822416][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 387.822715][ T72] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 387.822976][ T72] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 387.823234][ T72] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 387.823493][ T72] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 387.823786][ T72] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 387.824044][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 387.824372][ T72] br_dev_delete (net/bridge/br_if.c:396) 
[ 387.824724][ T72] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 387.825088][ T72] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 387.825428][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 387.825743][ T72] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 387.826064][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 387.826341][ T72] ? process_one_work (kernel/workqueue.c:2609) 
[ 387.826688][ T72] process_one_work (kernel/workqueue.c:2638) 
[ 387.826954][ T72] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 387.827213][ T72] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 387.827513][ T72] ? assign_work (kernel/workqueue.c:1101) 
[ 387.827764][ T72] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 387.828026][ T72] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 387.828376][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 387.828650][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 387.828969][ T72] kthread (kernel/kthread.c:388) 
[ 387.829259][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 387.829569][ T72] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 387.829823][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 387.830079][ T72] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  404.185363][   T72] ------------[ cut here ]------------
| [  404.185695][   T72] sysfs group 'bridge' not found for kobject 'br0'
| [ 404.186128][ T72] WARNING: CPU: 2 PID: 72 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  404.186670][   T72] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  404.187920][   T72] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  404.188610][   T72] Workqueue: netns cleanup_net
[ 404.188873][ T72] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 404.189265][ T72] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 9e e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 9e 	mov    $0xffffffff9efca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  404.190401][   T72] RSP: 0018:ffffc9000052fba0 EFLAGS: 00010282
[  404.190733][   T72] RAX: 0000000000000000 RBX: ffffffff9f3be220 RCX: ffffffff9c31056f
[  404.191190][   T72] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  404.191659][   T72] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a5f19
[  404.192096][   T72] R10: ffffc9000052f8cf R11: 205d323754202020 R12: ffff88800a7c2628
[  404.192570][   T72] R13: ffff88800a7c2df8 R14: ffffc9000052fc98 R15: ffff88800a7c2bc0
[  404.193017][   T72] FS:  0000000000000000(0000) GS:ffff88802ec00000(0000) knlGS:0000000000000000
[  404.193486][   T72] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  404.193842][   T72] CR2: 00007fda7731a000 CR3: 0000000006732004 CR4: 00000000001706f0
[  404.194273][   T72] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  404.194700][   T72] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  404.195154][   T72] Call Trace:
[  404.195376][   T72]  <TASK>
[ 404.195592][ T72] ? __warn (kernel/panic.c:677) 
[ 404.195867][ T72] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 404.196201][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 404.196592][ T72] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 404.196917][ T72] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 404.197283][ T72] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 404.197679][ T72] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 404.198091][ T72] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 404.198462][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 404.198872][ T72] br_dev_delete (net/bridge/br_if.c:396) 
[ 404.199272][ T72] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 404.199707][ T72] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 404.200050][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 404.200437][ T72] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 404.200821][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 404.201198][ T72] ? process_one_work (kernel/workqueue.c:2609) 
[ 404.201575][ T72] process_one_work (kernel/workqueue.c:2638) 
[ 404.201864][ T72] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 404.202238][ T72] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 404.202593][ T72] ? assign_work (kernel/workqueue.c:1101) 
[ 404.202890][ T72] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 404.203233][ T72] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 404.203726][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 404.204105][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 404.204429][ T72] kthread (kernel/kthread.c:388) 
[ 404.204748][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 404.205109][ T72] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 404.205441][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 404.205780][ T72] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  447.463708][   T72] ------------[ cut here ]------------
| [  447.464157][   T72] sysfs group 'bridge' not found for kobject 'br0'
| [ 447.464678][ T72] WARNING: CPU: 1 PID: 72 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  447.465345][   T72] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  447.469730][   T72] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  447.470574][   T72] Workqueue: netns cleanup_net
[ 447.470914][ T72] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 447.471351][ T72] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 9e e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 9e 	mov    $0xffffffff9efca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  447.476920][   T72] RSP: 0018:ffffc9000052fba0 EFLAGS: 00010282
[  447.477386][   T72] RAX: 0000000000000000 RBX: ffffffff9f3be220 RCX: ffffffff9c31056f
[  447.477976][   T72] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  447.478570][   T72] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a5f19
[  447.479153][   T72] R10: ffffc9000052f8cf R11: 205d323754202020 R12: ffff888006a02628
[  447.479715][   T72] R13: ffff888006a02df8 R14: ffffc9000052fc98 R15: ffff888006a02bc0
[  447.484585][   T72] FS:  0000000000000000(0000) GS:ffff88802e800000(0000) knlGS:0000000000000000
[  447.485344][   T72] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  447.486470][   T72] CR2: 00005605483743c8 CR3: 0000000033134003 CR4: 00000000001706f0
[  447.488262][   T72] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  447.489083][   T72] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  447.489861][   T72] Call Trace:
[  447.491233][   T72]  <TASK>
[ 447.491486][ T72] ? __warn (kernel/panic.c:677) 
[ 447.491850][ T72] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 447.493407][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 447.493847][ T72] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 447.494479][ T72] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 447.494861][ T72] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 447.497344][ T72] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 447.497807][ T72] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 447.499320][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 447.499773][ T72] br_dev_delete (net/bridge/br_if.c:396) 
[ 447.501239][ T72] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 447.501680][ T72] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 447.503130][ T72] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 447.503568][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 447.505051][ T72] ? process_one_work (kernel/workqueue.c:2609) 
[ 447.505479][ T72] process_one_work (kernel/workqueue.c:2638) 
[ 447.505893][ T72] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 447.507436][ T72] ? do_raw_spin_lock (./include/asm-generic/qspinlock.h:114 kernel/locking/spinlock_debug.c:116) 
[ 447.507889][ T72] ? assign_work (kernel/workqueue.c:1101) 
[ 447.509608][ T72] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 447.510585][ T72] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 447.511786][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 447.528423][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 447.528883][ T72] kthread (kernel/kthread.c:388) 
[ 447.529262][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 447.529655][ T72] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 447.530063][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 447.530464][ T72] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  467.388446][   T72] ------------[ cut here ]------------
| [  467.388936][   T72] sysfs group 'bridge' not found for kobject 'br0'
| [ 467.389343][ T72] WARNING: CPU: 2 PID: 72 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  467.389876][   T72] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  467.391171][   T72] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  467.391898][   T72] Workqueue: netns cleanup_net
[ 467.392187][ T72] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 467.392547][ T72] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 9e e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 9e 	mov    $0xffffffff9efca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  467.393786][   T72] RSP: 0018:ffffc9000052fba0 EFLAGS: 00010282
[  467.394318][   T72] RAX: 0000000000000000 RBX: ffffffff9f3be220 RCX: ffffffff9c31056f
[  467.394909][   T72] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  467.395598][   T72] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a5f19
[  467.396282][   T72] R10: ffffc9000052f8cf R11: 205d323754202020 R12: ffff888007a3a628
[  467.396983][   T72] R13: ffff888007a3adf8 R14: ffffc9000052fc98 R15: ffff888007a3abc0
[  467.397688][   T72] FS:  0000000000000000(0000) GS:ffff88802ec00000(0000) knlGS:0000000000000000
[  467.398444][   T72] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  467.399075][   T72] CR2: 0000560546eb6dec CR3: 000000000a526004 CR4: 00000000001706f0
[  467.399695][   T72] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  467.400316][   T72] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  467.400855][   T72] Call Trace:
[  467.401042][   T72]  <TASK>
[ 467.401201][ T72] ? __warn (kernel/panic.c:677) 
[ 467.401425][ T72] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 467.401739][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 467.402062][ T72] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 467.402310][ T72] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 467.402551][ T72] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 467.402853][ T72] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 467.403254][ T72] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 467.403567][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 467.403963][ T72] br_dev_delete (net/bridge/br_if.c:396) 
[ 467.404359][ T72] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 467.404776][ T72] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 467.405132][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 467.405506][ T72] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 467.405896][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 467.406269][ T72] ? process_one_work (kernel/workqueue.c:2609) 
[ 467.406672][ T72] process_one_work (kernel/workqueue.c:2638) 
[ 467.407073][ T72] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 467.407493][ T72] ? assign_work (kernel/workqueue.c:1101) 
[ 467.407856][ T72] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 467.408230][ T72] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 467.408752][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 467.409156][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 467.409555][ T72] kthread (kernel/kthread.c:388) 
[ 467.409872][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 467.410246][ T72] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 467.410596][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 467.410888][ T72] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  481.690453][   T72] ------------[ cut here ]------------
| [  481.690820][   T72] sysfs group 'bridge' not found for kobject 'br0'
| [ 481.691302][ T72] WARNING: CPU: 1 PID: 72 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  481.691816][   T72] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  481.692967][   T72] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  481.693624][   T72] Workqueue: netns cleanup_net
[ 481.693883][ T72] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 481.694212][ T72] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 9e e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 9e 	mov    $0xffffffff9efca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  481.695390][   T72] RSP: 0018:ffffc9000052fba0 EFLAGS: 00010282
[  481.695712][   T72] RAX: 0000000000000000 RBX: ffffffff9f3be220 RCX: ffffffff9c31056f
[  481.696197][   T72] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  481.696636][   T72] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a5f19
[  481.697059][   T72] R10: ffffc9000052f8cf R11: 205d323754202020 R12: ffff88800a07a628
[  481.697483][   T72] R13: ffff88800a07adf8 R14: ffffc9000052fc98 R15: ffff88800a07abc0
[  481.697900][   T72] FS:  0000000000000000(0000) GS:ffff88802e800000(0000) knlGS:0000000000000000
[  481.698395][   T72] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  481.698811][   T72] CR2: 00007ffe95140a88 CR3: 0000000033134002 CR4: 00000000001706f0
[  481.699280][   T72] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  481.699744][   T72] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  481.700195][   T72] Call Trace:
[  481.700392][   T72]  <TASK>
[ 481.700577][ T72] ? __warn (kernel/panic.c:677) 
[ 481.700835][ T72] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 481.701115][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 481.701437][ T72] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 481.701707][ T72] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 481.701953][ T72] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 481.702236][ T72] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 481.702540][ T72] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 481.702816][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 481.703111][ T72] br_dev_delete (net/bridge/br_if.c:396) 
[ 481.703401][ T72] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 481.703717][ T72] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 481.703978][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 481.704284][ T72] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 481.704567][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 481.704837][ T72] ? process_one_work (kernel/workqueue.c:2609) 
[ 481.705174][ T72] process_one_work (kernel/workqueue.c:2638) 
[ 481.705465][ T72] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 481.705797][ T72] ? assign_work (kernel/workqueue.c:1101) 
[ 481.706080][ T72] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 481.706362][ T72] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 481.706773][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 481.707197][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 481.707630][ T72] kthread (kernel/kthread.c:388) 
[ 481.707891][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 481.708184][ T72] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 481.708421][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 481.708679][ T72] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  496.406206][   T72] ------------[ cut here ]------------
| [  496.406534][   T72] sysfs group 'bridge' not found for kobject 'br0'
| [ 496.406990][ T72] WARNING: CPU: 3 PID: 72 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  496.407546][   T72] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  496.408869][   T72] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  496.409575][   T72] Workqueue: netns cleanup_net
[ 496.409834][ T72] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 496.410156][ T72] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 9e e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 9e 	mov    $0xffffffff9efca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  496.411292][   T72] RSP: 0018:ffffc9000052fba0 EFLAGS: 00010282
[  496.411647][   T72] RAX: 0000000000000000 RBX: ffffffff9f3be220 RCX: ffffffff9c31056f
[  496.412160][   T72] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  496.412622][   T72] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a5f19
[  496.413189][   T72] R10: ffffc9000052f8cf R11: 205d323754202020 R12: ffff88800aef2628
[  496.413676][   T72] R13: ffff88800aef2df8 R14: ffffc9000052fc98 R15: ffff88800aef2bc0
[  496.414158][   T72] FS:  0000000000000000(0000) GS:ffff88802f000000(0000) knlGS:0000000000000000
[  496.414755][   T72] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  496.415192][   T72] CR2: 00007f51f6d5b000 CR3: 0000000033134001 CR4: 00000000001706f0
[  496.415701][   T72] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  496.416194][   T72] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  496.416667][   T72] Call Trace:
[  496.416894][   T72]  <TASK>
[ 496.417097][ T72] ? __warn (kernel/panic.c:677) 
[ 496.417350][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 496.417650][ T72] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 496.417946][ T72] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 496.418229][ T72] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 496.418548][ T72] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 496.418861][ T72] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 496.419139][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 496.419465][ T72] br_dev_delete (net/bridge/br_if.c:396) 
[ 496.419751][ T72] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 496.420100][ T72] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 496.420387][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 496.420644][ T72] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 496.420907][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 496.421165][ T72] ? process_one_work (kernel/workqueue.c:2609) 
[ 496.421439][ T72] process_one_work (kernel/workqueue.c:2638) 
[ 496.421712][ T72] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 496.422016][ T72] ? assign_work (kernel/workqueue.c:1101) 
[ 496.422271][ T72] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 496.422519][ T72] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 496.422873][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 496.423158][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 496.423440][ T72] kthread (kernel/kthread.c:388) 
[ 496.423705][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 496.424004][ T72] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 496.424294][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 496.424572][ T72] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  509.864297][   T72] ------------[ cut here ]------------
| [  509.864613][   T72] sysfs group 'bridge' not found for kobject 'br0'
| [ 509.864997][ T72] WARNING: CPU: 1 PID: 72 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  509.865565][   T72] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  509.866821][   T72] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  509.867591][   T72] Workqueue: netns cleanup_net
[ 509.867886][ T72] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 509.868260][ T72] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 9e e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 9e 	mov    $0xffffffff9efca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  509.869486][   T72] RSP: 0018:ffffc9000052fba0 EFLAGS: 00010282
[  509.869867][   T72] RAX: 0000000000000000 RBX: ffffffff9f3be220 RCX: ffffffff9c31056f
[  509.870376][   T72] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  509.870885][   T72] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a5f19
[  509.871392][   T72] R10: ffffc9000052f8cf R11: 205d323754202020 R12: ffff88800a0b2628
[  509.871891][   T72] R13: ffff88800a0b2df8 R14: ffffc9000052fc98 R15: ffff88800a0b2bc0
[  509.872356][   T72] FS:  0000000000000000(0000) GS:ffff88802e800000(0000) knlGS:0000000000000000
[  509.872916][   T72] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  509.873358][   T72] CR2: 00007f8003493000 CR3: 0000000033134001 CR4: 00000000001706f0
[  509.873875][   T72] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  509.874362][   T72] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  509.874787][   T72] Call Trace:
[  509.874978][   T72]  <TASK>
[ 509.875154][ T72] ? __warn (kernel/panic.c:677) 
[ 509.875386][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 509.875665][ T72] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 509.875918][ T72] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 509.876168][ T72] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 509.876420][ T72] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 509.876772][ T72] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 509.877087][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 509.877367][ T72] br_dev_delete (net/bridge/br_if.c:396) 
[ 509.877621][ T72] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 509.877908][ T72] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 509.878159][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 509.878418][ T72] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 509.878701][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 509.878958][ T72] ? process_one_work (kernel/workqueue.c:2609) 
[ 509.879245][ T72] process_one_work (kernel/workqueue.c:2638) 
[ 509.879515][ T72] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 509.879808][ T72] ? assign_work (kernel/workqueue.c:1101) 
[ 509.880065][ T72] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 509.880319][ T72] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 509.880677][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 509.880960][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 509.881250][ T72] kthread (kernel/kthread.c:388) 
[ 509.881485][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 509.881737][ T72] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 509.881979][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 509.882242][ T72] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  524.840509][   T72] ------------[ cut here ]------------
| [  524.840846][   T72] sysfs group 'bridge' not found for kobject 'br0'
| [ 524.841238][ T72] WARNING: CPU: 1 PID: 72 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  524.841819][   T72] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  524.843508][   T72] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  524.844268][   T72] Workqueue: netns cleanup_net
[ 524.844579][ T72] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 524.844928][ T72] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 9e e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 9e 	mov    $0xffffffff9efca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  524.846069][   T72] RSP: 0018:ffffc9000052fba0 EFLAGS: 00010282
[  524.846441][   T72] RAX: 0000000000000000 RBX: ffffffff9f3be220 RCX: ffffffff9c31056f
[  524.846921][   T72] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  524.847385][   T72] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a5f19
[  524.847892][   T72] R10: ffffc9000052f8cf R11: 205d323754202020 R12: ffff88800613a628
[  524.848354][   T72] R13: ffff88800613adf8 R14: ffffc9000052fc98 R15: ffff88800613abc0
[  524.848978][   T72] FS:  0000000000000000(0000) GS:ffff88802e800000(0000) knlGS:0000000000000000
[  524.849493][   T72] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  524.849841][   T72] CR2: 00007fddffc3c270 CR3: 000000000abdc005 CR4: 00000000001706f0
[  524.850270][   T72] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  524.850687][   T72] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  524.851113][   T72] Call Trace:
[  524.851292][   T72]  <TASK>
[ 524.851450][ T72] ? __warn (kernel/panic.c:677) 
[ 524.851673][ T72] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 524.851931][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 524.852213][ T72] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 524.852472][ T72] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 524.852744][ T72] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 524.853016][ T72] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 524.853297][ T72] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 524.853554][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 524.853863][ T72] br_dev_delete (net/bridge/br_if.c:396) 
[ 524.854150][ T72] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 524.854459][ T72] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 524.854773][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 524.855045][ T72] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 524.855334][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 524.855647][ T72] ? process_one_work (kernel/workqueue.c:2609) 
[ 524.855930][ T72] process_one_work (kernel/workqueue.c:2638) 
[ 524.856233][ T72] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 524.856563][ T72] ? assign_work (kernel/workqueue.c:1101) 
[ 524.856820][ T72] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 524.857077][ T72] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 524.857458][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 524.857731][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 524.858023][ T72] kthread (kernel/kthread.c:388) 
[ 524.858275][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 524.858566][ T72] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 524.858806][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 524.859056][ T72] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  539.261287][   T72] ------------[ cut here ]------------
| [  539.261643][   T72] sysfs group 'bridge' not found for kobject 'br0'
| [ 539.262091][ T72] WARNING: CPU: 2 PID: 72 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  539.262648][   T72] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  539.263871][   T72] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  539.264546][   T72] Workqueue: netns cleanup_net
[ 539.264815][ T72] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 539.265168][ T72] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 9e e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 9e 	mov    $0xffffffff9efca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  539.266200][   T72] RSP: 0018:ffffc9000052fba0 EFLAGS: 00010282
[  539.266527][   T72] RAX: 0000000000000000 RBX: ffffffff9f3be220 RCX: ffffffff9c31056f
[  539.266953][   T72] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  539.267411][   T72] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a5f19
[  539.267897][   T72] R10: ffffc9000052f8cf R11: 205d323754202020 R12: ffff888006dc2628
[  539.268348][   T72] R13: ffff888006dc2df8 R14: ffffc9000052fc98 R15: ffff888006dc2bc0
[  539.268801][   T72] FS:  0000000000000000(0000) GS:ffff88802ec00000(0000) knlGS:0000000000000000
[  539.269340][   T72] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  539.269689][   T72] CR2: 00007ff1a9ba8000 CR3: 0000000033134006 CR4: 00000000001706f0
[  539.270158][   T72] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  539.270605][   T72] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  539.271057][   T72] Call Trace:
[  539.271245][   T72]  <TASK>
[ 539.271416][ T72] ? __warn (kernel/panic.c:677) 
[ 539.271668][ T72] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 539.271963][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 539.272266][ T72] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 539.272533][ T72] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 539.272781][ T72] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 539.273102][ T72] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 539.273412][ T72] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 539.273690][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 539.274045][ T72] br_dev_delete (net/bridge/br_if.c:396) 
[ 539.274380][ T72] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 539.274708][ T72] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 539.274970][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 539.275283][ T72] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 539.275594][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 539.275889][ T72] ? process_one_work (kernel/workqueue.c:2609) 
[ 539.276194][ T72] process_one_work (kernel/workqueue.c:2638) 
[ 539.276509][ T72] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 539.276833][ T72] ? assign_work (kernel/workqueue.c:1101) 
[ 539.277112][ T72] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 539.277385][ T72] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 539.277775][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 539.278105][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 539.278415][ T72] kthread (kernel/kthread.c:388) 
[ 539.278638][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 539.278886][ T72] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 539.279147][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 539.279396][ T72] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  555.224952][   T72] ------------[ cut here ]------------
| [  555.225359][   T72] sysfs group 'bridge' not found for kobject 'br0'
| [ 555.225775][ T72] WARNING: CPU: 2 PID: 72 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  555.226424][   T72] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  555.227742][   T72] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  555.228535][   T72] Workqueue: netns cleanup_net
[ 555.228829][ T72] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 555.229183][ T72] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 9e e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 9e 	mov    $0xffffffff9efca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  555.230360][   T72] RSP: 0018:ffffc9000052fba0 EFLAGS: 00010282
[  555.230759][   T72] RAX: 0000000000000000 RBX: ffffffff9f3be220 RCX: ffffffff9c31056f
[  555.231236][   T72] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  555.231713][   T72] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a5f19
[  555.232183][   T72] R10: ffffc9000052f8cf R11: 205d323754202020 R12: ffff888006aca628
[  555.232764][   T72] R13: ffff888006acadf8 R14: ffffc9000052fc98 R15: ffff888006acabc0
[  555.233203][   T72] FS:  0000000000000000(0000) GS:ffff88802ec00000(0000) knlGS:0000000000000000
[  555.233682][   T72] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  555.234032][   T72] CR2: 00007f6edbb362a8 CR3: 0000000033134002 CR4: 00000000001706f0
[  555.234463][   T72] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  555.234904][   T72] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  555.235469][   T72] Call Trace:
[  555.235710][   T72]  <TASK>
[ 555.235905][ T72] ? __warn (kernel/panic.c:677) 
[ 555.236156][ T72] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 555.236439][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 555.236742][ T72] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 555.237026][ T72] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 555.237292][ T72] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 555.237543][ T72] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 555.237819][ T72] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 555.238062][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 555.238372][ T72] br_dev_delete (net/bridge/br_if.c:396) 
[ 555.238626][ T72] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 555.238909][ T72] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 555.239158][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 555.239422][ T72] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 555.239711][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 555.239999][ T72] ? process_one_work (kernel/workqueue.c:2609) 
[ 555.240312][ T72] process_one_work (kernel/workqueue.c:2638) 
[ 555.240584][ T72] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 555.240881][ T72] ? assign_work (kernel/workqueue.c:1101) 
[ 555.241148][ T72] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 555.241413][ T72] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 555.241767][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 555.242053][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 555.242334][ T72] kthread (kernel/kthread.c:388) 
[ 555.242551][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 555.242791][ T72] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 555.243042][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 555.243324][ T72] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  571.084804][   T72] ------------[ cut here ]------------
| [  571.085129][   T72] sysfs group 'bridge' not found for kobject 'br0'
| [ 571.085514][ T72] WARNING: CPU: 0 PID: 72 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  571.086017][   T72] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  571.087155][   T72] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  571.087811][   T72] Workqueue: netns cleanup_net
[ 571.088120][ T72] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 571.088470][ T72] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 9e e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 9e 	mov    $0xffffffff9efca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  571.089727][   T72] RSP: 0018:ffffc9000052fba0 EFLAGS: 00010282
[  571.090105][   T72] RAX: 0000000000000000 RBX: ffffffff9f3be220 RCX: ffffffff9c31056f
[  571.090563][   T72] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  571.091031][   T72] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a5f19
[  571.091523][   T72] R10: ffffc9000052f8cf R11: 205d323754202020 R12: ffff88800a552628
[  571.091990][   T72] R13: ffff88800a552df8 R14: ffffc9000052fc98 R15: ffff88800a552bc0
[  571.092442][   T72] FS:  0000000000000000(0000) GS:ffff88802e400000(0000) knlGS:0000000000000000
[  571.092932][   T72] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  571.093291][   T72] CR2: 0000560546e680f0 CR3: 0000000033134004 CR4: 00000000001706f0
[  571.093723][   T72] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  571.094152][   T72] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  571.094588][   T72] Call Trace:
[  571.094767][   T72]  <TASK>
[ 571.094927][ T72] ? __warn (kernel/panic.c:677) 
[ 571.095157][ T72] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 571.095428][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 571.095854][ T72] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 571.096136][ T72] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 571.096544][ T72] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 571.096866][ T72] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 571.097216][ T72] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 571.097548][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 571.097847][ T72] br_dev_delete (net/bridge/br_if.c:396) 
[ 571.098191][ T72] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 571.098565][ T72] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 571.098826][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 571.099159][ T72] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 571.099503][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 571.099812][ T72] ? process_one_work (kernel/workqueue.c:2609) 
[ 571.100172][ T72] process_one_work (kernel/workqueue.c:2638) 
[ 571.100600][ T72] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 571.100997][ T72] ? assign_work (kernel/workqueue.c:1101) 
[ 571.101299][ T72] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 571.101678][ T72] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 571.102110][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 571.102472][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 571.102800][ T72] kthread (kernel/kthread.c:388) 
[ 571.103068][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 571.103396][ T72] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 571.103640][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 571.103958][ T72] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) 
| [  586.641702][   T72] ------------[ cut here ]------------
| [  586.642066][   T72] sysfs group 'bridge' not found for kobject 'br0'
| [ 586.642486][ T72] WARNING: CPU: 0 PID: 72 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
| [  586.643087][   T72] Modules linked in: geneve vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio
[  586.644725][   T72] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  586.645661][   T72] Workqueue: netns cleanup_net
[ 586.646099][ T72] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 586.646615][ T72] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 a7 fc 9e e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 da ff
All code
========
   0:	89 d9                	mov    %ebx,%ecx
   2:	49 8b 14 24          	mov    (%r12),%rdx
   6:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   d:	fc ff df 
  10:	48 c1 e9 03          	shr    $0x3,%rcx
  14:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  18:	75 45                	jne    0x5f
  1a:	48 8b 33             	mov    (%rbx),%rsi
  1d:	48 c7 c7 a0 a7 fc 9e 	mov    $0xffffffff9efca7a0,%rdi
  24:	e8 60 65 5e ff       	call   0xffffffffff5e6589
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	48 83 c4 08          	add    $0x8,%rsp
  32:	5b                   	pop    %rbx
  33:	5d                   	pop    %rbp
  34:	41 5c                	pop    %r12
  36:	c3                   	ret
  37:	cc                   	int3
  38:	cc                   	int3
  39:	cc                   	int3
  3a:	cc                   	int3
  3b:	e8 e9 c7 da ff       	call   0xffffffffffdac829

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	48 83 c4 08          	add    $0x8,%rsp
   8:	5b                   	pop    %rbx
   9:	5d                   	pop    %rbp
   a:	41 5c                	pop    %r12
   c:	c3                   	ret
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	e8 e9 c7 da ff       	call   0xffffffffffdac7ff
[  586.648207][   T72] RSP: 0018:ffffc9000052fba0 EFLAGS: 00010282
[  586.648730][   T72] RAX: 0000000000000000 RBX: ffffffff9f3be220 RCX: ffffffff9c31056f
[  586.649418][   T72] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
[  586.650105][   T72] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a5f19
[  586.650795][   T72] R10: ffffc9000052f8cf R11: 205d323754202020 R12: ffff88800ac9a628
[  586.651460][   T72] R13: ffff88800ac9adf8 R14: ffffc9000052fc98 R15: ffff88800ac9abc0
[  586.652150][   T72] FS:  0000000000000000(0000) GS:ffff88802e400000(0000) knlGS:0000000000000000
[  586.652909][   T72] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  586.653493][   T72] CR2: 00007f75819070e0 CR3: 0000000033134006 CR4: 00000000001706f0
[  586.654165][   T72] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  586.654843][   T72] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  586.655519][   T72] Call Trace:
[  586.655831][   T72]  <TASK>
[ 586.656079][ T72] ? __warn (kernel/panic.c:677) 
[ 586.656403][ T72] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) 
[ 586.656781][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 586.657200][ T72] ? report_bug (lib/bug.c:201 lib/bug.c:219) 
[ 586.657563][ T72] ? handle_bug (arch/x86/kernel/traps.c:238) 
[ 586.657905][ T72] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) 
[ 586.658294][ T72] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) 
[ 586.658693][ T72] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) 
[ 586.659108][ T72] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) 
[ 586.659577][ T72] br_dev_delete (net/bridge/br_if.c:396) 
[ 586.660055][ T72] br_net_exit_batch_rtnl (net/bridge/br.c:369) 
[ 586.660523][ T72] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) 
[ 586.660931][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 586.661364][ T72] ? __pfx_cleanup_net (net/core/net_namespace.c:581) 
[ 586.661676][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 586.662102][ T72] ? process_one_work (kernel/workqueue.c:2609) 
[ 586.662551][ T72] process_one_work (kernel/workqueue.c:2638) 
[ 586.662942][ T72] ? __pfx_process_one_work (kernel/workqueue.c:2542) 
[ 586.663377][ T72] ? assign_work (kernel/workqueue.c:1101) 
[ 586.663742][ T72] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) 
[ 586.664110][ T72] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 586.664621][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 586.665030][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) 
[ 586.665485][ T72] kthread (kernel/kthread.c:388) 
[ 586.665839][ T72] ? __pfx_kthread (kernel/kthread.c:341) 
[ 586.666256][ T72] ret_from_fork (arch/x86/kernel/process.c:153) 
[ 586.666648][ T72] ? __pfx_kthread (kernel/kthread.c:341) 


Finger prints:
geneve_exit_batch_rtnl:cleanup_net:process_one_work:worker_thread
dump_stack_lvl:print_report:kasan_report:kobject_put
refcount_warn_saturate:br_sysfs_delbr:br_dev_delete:br_net_exit_batch_rtnl
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net
sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net